109 lines
2.3 KiB
C
109 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2014 Red Hat, Inc.
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* Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
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*/
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/*\
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* [Description]
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*
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* Test SysV IPC message passing through different processes.
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*
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* [Algorithm]
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*
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* 1. Clones two child processes with CLONE_NEWIPC flag, each child
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* gets System V message queue (msg) with the _identical_ key.
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* 2. Child1 appends a message with identifier #1 to the message queue.
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* 3. Child2 appends a message with identifier #2 to the message queue.
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* 4. Appends to the message queue with the identical key but from
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* two different IPC namespaces should not interfere with each other
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* and so child1 checks whether its message queue doesn't contain
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* a message with identifier #2, if it doesn't test passes, otherwise
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* test fails.
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*/
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#define _GNU_SOURCE
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#include <sys/wait.h>
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#include <sys/msg.h>
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#include <sys/types.h>
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#include "tst_safe_sysv_ipc.h"
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#include "tst_test.h"
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#include "common.h"
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#define TESTKEY 124426L
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struct sysv_msg {
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long mtype;
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char mtext[1];
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};
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static int chld1_msg(LTP_ATTRIBUTE_UNUSED void *arg)
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{
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int id;
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struct sysv_msg m = {
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.mtype = 1,
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.mtext = "A",
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};
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struct sysv_msg rec;
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id = SAFE_MSGGET(TESTKEY, IPC_CREAT | 0600);
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SAFE_MSGSND(id, &m, sizeof(m.mtext), 0);
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TST_CHECKPOINT_WAIT(0);
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TEST(msgrcv(id, &rec, sizeof(rec.mtext), 2, IPC_NOWAIT));
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if (TST_RET < 0 && TST_ERR != ENOMSG)
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tst_brk(TBROK | TERRNO, "msgrcv error");
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/* if child1 message queue has changed (by child2) report fail */
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if (TST_RET > 0)
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tst_res(TFAIL, "messages leak between namespacess");
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else
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tst_res(TPASS, "messages does not leak between namespaces");
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TST_CHECKPOINT_WAKE(0);
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SAFE_MSGCTL(id, IPC_RMID, NULL);
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return 0;
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}
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static int chld2_msg(LTP_ATTRIBUTE_UNUSED void *arg)
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{
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int id;
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struct sysv_msg m = {
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.mtype = 2,
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.mtext = "B",
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};
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id = SAFE_MSGGET(TESTKEY, IPC_CREAT | 0600);
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SAFE_MSGSND(id, &m, sizeof(m.mtext), 0);
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TST_CHECKPOINT_WAKE_AND_WAIT(0);
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SAFE_MSGCTL(id, IPC_RMID, NULL);
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return 0;
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}
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static void run(void)
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{
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clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld1_msg, NULL);
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clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld2_msg, NULL);
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}
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static void setup(void)
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{
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check_newipc();
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}
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static struct tst_test test = {
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.test_all = run,
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.setup = setup,
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.needs_root = 1,
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.needs_checkpoints = 1,
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};
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